Gilroy Weather in May
Average highs run from 75°F on May 1 to 80°F on May 31, and lows from 47°F to 51°F. Normal precipitation for the month is 0.56 in over about 3 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 77°F
- Average low
- 49°F
- Precipitation
- 0.56 in
- Record high
- 106°FMay 18, 1997
- Record low
- 31°FMay 4, 1959
- Chance of a freeze
- 1%
- Days of 90°F or more
- 3.3
- Daylight
- 13 h 44 min to 14 h 32 min
- Cloud cover
- 33%
- Humidity
- 63%
- Dew point
- 46°F
- Wind
- 8.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 75°F | 47°F | 99°F 1996 | 36°F 1967 | 12% |
| May 2 | 75°F | 47°F | 97°F 1996 | 36°F 1964 | 12% |
| May 3 | 75°F | 47°F | 97°F 1966 | 37°F 1959 | 12% |
| May 4 | 75°F | 47°F | 98°F 2004 | 31°F 1959 | 12% |
| May 5 | 75°F | 47°F | 100°F 1990 | 37°F 1965 | 11% |
| May 6 | 76°F | 48°F | 100°F 1987 | 34°F 1970 | 11% |
| May 7 | 76°F | 48°F | 100°F 1987 | 37°F 1964 | 11% |
| May 8 | 76°F | 48°F | 96°F 2001 | 36°F 1964 | 10% |
| May 9 | 76°F | 48°F | 99°F 2001 | 31°F 1964 | 10% |
| May 10 | 76°F | 48°F | 92°F 1993 | 35°F 1964 | 10% |
| May 11 | 77°F | 49°F | 93°F 1987 | 38°F 1963 | 9% |
| May 12 | 77°F | 49°F | 96°F 1988 | 38°F 1963 | 9% |
| May 13 | 77°F | 49°F | 105°F 1976 | 38°F 1980 | 9% |
| May 14 | 77°F | 49°F | 103°F 1976 | 38°F 1980 | 9% |
| May 15 | 77°F | 49°F | 99°F 1972 | 39°F 2015 | 8% |
| May 16 | 77°F | 49°F | 103°F 1970 | 39°F 1974 | 8% |
| May 17 | 78°F | 49°F | 101°F 1970 | 38°F 1974 | 8% |
| May 18 | 78°F | 50°F | 106°F 1997 | 37°F 1974 | 8% |
| May 19 | 78°F | 50°F | 100°F 2008 | 39°F 1974 | 7% |
| May 20 | 78°F | 50°F | 99°F 2008 | 37°F 1962 | 7% |
| May 21 | 78°F | 50°F | 98°F 1988 | 39°F 1962 | 7% |
| May 22 | 78°F | 50°F | 97°F 1967 | 38°F 1960 | 7% |
| May 23 | 79°F | 50°F | 92°F 1967 | 33°F 2008 | 6% |
| May 24 | 79°F | 50°F | 97°F 1982 | 34°F 2008 | 6% |
| May 25 | 79°F | 50°F | 98°F 1982 | 34°F 2008 | 6% |
| May 26 | 79°F | 50°F | 102°F 2020 | 41°F 1978 | 6% |
| May 27 | 79°F | 50°F | 101°F 1974 | 42°F 1959 | 6% |
| May 28 | 79°F | 50°F | 102°F 1984 | 42°F 1976 | 5% |
| May 29 | 80°F | 51°F | 100°F 1973 | 42°F 1977 | 5% |
| May 30 | 80°F | 51°F | 101°F 1978 | 35°F 1982 | 5% |
| May 31 | 80°F | 51°F | 100°F 1978 | 40°F 1971 | 5% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:12 AM, sunset 7:56 PM
- May 31
- sunrise 5:48 AM, sunset 8:20 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00043417 (Gilroy), public domain. Records: NOAA GHCN-Daily, station USC00043417, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.